That is correct.
According to Chris, the gold is a unique puzzle in itself (as expected) and EACH puzzle will be unique (no two puzzles will be exactly the same). We don't know what this means yet though. I'd like to think she is a little more unique than say snowflakes, but I also have a hard time imagining a mechanism to make each progression path unique in a meaningful and significant way for each owner. That doesn't mean that Chris hasn't thought of something. So far, all we know is that Chris is always about 3 steps ahead of our wildest imaginations when it comes to what is possible within the sleeve.
Only time, a few bottles of Advil and several restless night will tell, but rest assured, Gold will "definitely be something else."